A trough-type black body solar photothermal converter

Abstract

The purpose of the present invention is to provide a solar photothermal conversion device suitable for a black body of a trough solar tracking system. The solar light-to-heat conversion coating is arranged on the inner shell surface of the black body, and the sunlight enters the black body through the opening part to realize the conversion and utilization of solar energy. In this way, the sunlight can be absorbed and converted to the greatest extent after the sunlight is injected into the cavity through the opening, and the loss of reflection, refraction and transmission of other existing structures can be reduced, and the conversion efficiency can be improved. The linear opening is provided with sunlight by the trough tracking system, so that in the process of tracking the solar energy by the trough system, the sunlight is always injected into the linear opening, and is injected into the black body through the opening to realize the utilization of solar energy.

Description

technical field [0001] The invention relates to thermal utilization of solar energy, a device for converting solar energy into heat energy, and relates to the application of solar energy for heating, hot water, cooking, power generation, refrigeration, drying and the like by using a black body device, especially the medium and high temperature utilization of solar energy. Background technique [0002] The mature application technology of solar energy is the low-temperature hot water utilization of solar energy. The vacuum glass tube technology is mainly used to convert solar energy into heat energy. In this technology, there is a technology of inserting a heat pipe into the vacuum glass tube to transfer heat to the outside to obtain solar energy. , and various devices developed on the basis of vacuum glass, in which a vacuum layer is set in the vacuum glass tube for heat preservation, and a selective coating is set inside the vacuum layer to absorb and convert solar energy, a...

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Problems solved by technology

[0002] The mature application technology of solar energy is the low-temperature hot water utilization of solar energy. The vacuum glass tube technology is mainly used to convert solar energy into heat energy. In this technology, there is a technology of inserting a heat pipe into the vacuum glass tube to transfer heat to the outside to obtain solar energy. , and various devices developed on the basis of vacuum glass, in which a vacuum layer is set in the vacuum glass tube for heat preservation, and a selective coating is set inside the vacuum layer to absorb and convert solar energy, although the vacuum glass layer is very Good heat preservation has been realized, and the selective coating has realized the conversion of solar energy well, but the converted heat energy is very uneconomical to use, such as using the existing method to directly flow water into the vacuum glass tube for direct replacement heat, but it cannot be used in winter. Although the heat pipe technology is used to transfer heat in winter, it increases the cost and reduces the utilization rate of heat energy. High temperature applications, such as solar thermal power applications;

[0003] Existing solar cookers that use solar energy at medium and high temperatures mainly use reflectors to reflect sunlight and focus solar energy directly on a cooker to realize the utilization of solar energy. This technology can well achieve the medium and high temperature of solar energy. Collection, but its thermal energy receiving method is single, only a simple cooker is placed directly on it, and it cannot be collected and utilized on a large scale; at the same time, it is impossible to collect solar energy for night and rainy days;

[0004] Existing technology The medium and high temperature power generation technology of solar energy mainly adopts tower type, trough type, and butterfly type. The trough type solar energy is a commercialized solar light-to-heat conversion device, which mainly uses glass tubes on the outside and stainless steel metal tubes on the inside. , the interior is vacuumed to realize the collection of solar energy; but the price of this kind of absorber is high, and only a few enterprises can master its production technology; at the same time, due to the existing technology, solar light will produce reflection\refraction after the solar light is irradiated on the cylinder Light loss, so that the conversion efficiency is not high

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